Merge branch 'dz-add-profile-settings-link' into 'master'

Add profile settings link to header user dropdown

It allows you to get to profile settings right from avatar without triggering sidebar 

Based on https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/5077#note_12878162 

See merge request !5090

app/views/layouts/header/_default.html.haml

@@ -46,6 +46,8 @@
                 %ul
                   %li
                     = link_to "Profile", current_user
+                  %li
+                    = link_to "Profile Settings", profile_path
                   %li.divider
                   %li
                     = link_to "Sign out", destroy_user_session_path, method: :delete, class: "sign-out-link", title: 'Sign out'